Your column prefixes are used by the record parser to build the result 
set array.

If you changed it as follows (formatting added for clarity only):

SELECT i.id, 
        i.client_id, 
        ifnull(total,'0') as i.total_due,
        ifnull(i.due,'NA') as i.due_date, 
        ifnull(sum(p.amount),0) as i.total_paid,
        ifnull(i.total - sum(p.amount),i.total) as i.total_still_due
FROM invoices LEFT JOIN payments  ON p.invoice_id = i.id
        WHERE i.total > 0
        GROUP BY p.client_id
        ORDER BY due_date";

Then, everything gets put in the [i] array. You could change [i] above 
to give it more meaning.

Was this what you needed?
Fred

hutchic wrote:
> With the following function
>
>       function calculate_due(){
>               $query = "
>                       SELECT i.id, i.client_id, ifnull(total,'0') as 
> total_due,
> ifnull(i.due,'NA') as due_date, ifnull(sum(p.amount),0) as total_paid,
> ifnull(i.total - sum(p.amount),i.total) as total_still_due
>                       FROM invoices i LEFT JOIN payments p ON p.invoice_id = 
> i.id
>                       WHERE total > 0
>                       GROUP BY p.client_id
>                       ORDER BY due_date";
>               $ret = $this->query($query);
>               pr($ret);
>               die('');
>       }
>
> The output I get is
>
> Array
> (
>     [0] => Array
>         (
>             [i] => Array
>                 (
>                     [id] => 8
>                     [client_id] => 1
>                 )
>
>             [0] => Array
>                 (
>                     [total_due] => 3.250
>                     [due_date] => NA
>                     [total_paid] => 0.00
>                     [total_still_due] => 3.250
>                 )
>
>         )
>
> )
>
> In version 1.1.19.6305
>
> Help is greatly appreciated
> >
>
>   


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